Save preferences to same directory to binary file on Windows

lib/platform/path.dart

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+import 'dart:async';
+import 'package:flutter/services.dart';
+import 'package:logging/logging.dart';
+import '../utils.dart';
+
+final Logger _log = Logger("platformPath");
+
+class Path {
+  static const platform = MethodChannel("lifegpc.eh_downloader_flutter/path");
+  String? _currentExe;
+  bool _currentExeLoaded = false;
+
+  String? get currentExe => _currentExe;
+
+  Future<String?> getCurrentExe() async {
+    if (_currentExeLoaded) return _currentExe;
+    try {
+      final String result = await platform.invokeMethod("getCurrentExe");
+      _currentExe = result;
+    } on PlatformException catch (e) {
+      if (isWindows) {
+        _log.warning("Failed to get current exe path:", e);
+      }
+    }
+    _currentExeLoaded = true;
+    return _currentExe;
+  }
+}